Physics
Which of the following is preferred for accelerating electrons?

Synchrotron
Betatron
Cyclotron
Van de Graft Generator

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Physics
What is the principle of a ''Life Jacket"?

It decreases the volume of the person to keep him afloat
It provides oxygen to a drowning person
It increases the volume of the person to keep him afloat
The person can sit on it like a raft

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